GAOHOU PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC For Arduino

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GAOHOU PH0-14 Value Detect Sensor Module + PH Electrode Probe BNC For Arduino
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Product Description
Overview:PH0-14 Value Detect Sensor Module Features: Heating voltage: 5 ± 0.2V (AC DC) Working current: 5-10mA Detectable concentration range: PH0-14 Detection Temperature range: 0-80 ℃ Response time:≤5S Settling Time:≤60S Component Power:≤0.5W Working temperature:-10-50 ℃ (nominal temperature 20 ℃) Humidity: 95% RH (nominal humidity 65% RH) Module Size: 42mm × 32mm × 20mm Output:analog voltage signal output With 4pcs M3 Mounting Holes Note: The color of item might be slightly different from the picture shown, which mainly lies in different light effect and computer monitor. Please give us your understanding. Thank you! PH Electrode Probe BNC For Arduino: The PH electrode has a single cylinder that allows direct connection to the input terminal of a PH meter, controller, or any PH device which has a BNC input terminal. The PH electrode probe is accurate and reliable that can gives almost instantaneous readings. Features: PH range: 0-14 PH Temperature range: 0-80℃ Zero-point: 7 ± 0.25PH Alkali Error: ≤15 mv Theoretical Percentage Slope: ≧98% Internal Resistance: ≦250MΩ Response Time: ≦1min Operating Temperature: 0-60℃ Terminal Blocks: BNC plug BNC Connector suitable for most PH meter and controller. Suitable for wide range of application: Aquariums, Hydroponics, Laboratory etc. Package Includes:1pcs Liquid PH0-14 Value Detect Test Sensor Module 1pcs PH Electrode Probe Hydroponic Sensor BNC Interface Note: We will repackage this item to reduce shipping weight paper and bag waste. We guaranty the item will be well treated and protected. Let's protect the environment together! Thank you for your understanding!
Features
Response time:≤5S;Settling Time:≤60S;Component Power:≤0.5W;Detectable concentration range: PH0-14;Module Size: 42mm×32mm×20mm;Output: analog voltage signal output;With 4pcs M3 Mounting Holes
Getting the voltage varies on what you're using. The PH for this sensor is not at 0v for a PH7 it's around 2.51v from the multi-meter and PH4 at 3.03. If you calculate the step, 2.51-3.03 =-0.52. The difference between ph4.01 and PH7 is 2.99.
If you're using a Particle product like the Photon or Argon, be aware of a bug. It's a hardware issue with the analog ports fluctuating a ghost voltage. This fluctuation is enough at these low voltages reading to make your ph sway by .7 or more. To fix this, you'll need to add a 0.1uF cap between the analog port your using and ground.
This PH electrode probe must be calibrated with standard buffer solution before each use, and the electrode probe cannot be tested continuously for a long time, which will shorten its life. There are two trimmers on the circuit board. One of them is for offset adjustment (closest to BNC connector) accomplished by removing the Ph probe and shorting the BNC connector with a wire. The other trimmer is an upper limit threshold for the digital output pin.
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